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[Diversity and biogeographic affinities of sharks, rays and chimaeras (Chondrichthyes: Elasmobranchii, Holocephali) of Mexico].

Authors: Del Moral Flores, Luis Fernando; Morrone, Juan J.; Alcocer, Javier; Pérez-Ponce de León, Gerardo;

[Diversity and biogeographic affinities of sharks, rays and chimaeras (Chondrichthyes: Elasmobranchii, Holocephali) of Mexico].

Abstract

A pesar de la gran importancia ecológica, evolutiva y económica de los condrictios, su diversidad ha sido escasamente estudiada en México. En este estudio se describe la diversidad de especies de condrictios que se han registrado hasta el momento para México, la cual se compone de 214 especies (111 tiburones, 95 rayas y 8 quimeras) y representa el 17.3 % de las registradas a nivel mundial. Las familias con mayor diversidad de especies son Rajidae (14.5 %), Carcharhinidae (12.1 %), Pentanchidae, Triakidae y Urotrygonidae (5.1 %). En términos de su distribución geográfica, la diversidad del litoral del Pacífico mexicano contiene el 56.1 % del total de aquellas que habitan en las aguas marinas y salobres de México (120 spp., 62 géneros, 37 familias y 14 órdenes); porcentaje muy similar a las que habitan en el litoral del Atlántico con el 55.1 % de las especies (118 especies, 59 géneros, 35 familias y 13 órdenes). Las afinidades biogeográficas de la fauna de condrictios mexicanos son complejas, pues 19.7 % de las especies son circunglobales, 9.9 % trasatlánticas, 1.9 % transpacíficas y 9.4 % son endémicas de la zona económica exclusiva. Además, el 36.6 % de las especies son endémicas del Pacífico oriental, presentan mayor afinidad a la provincia de Cortés (27.7 %), seguida de la de California (20.7 %), Panamá (19.3 %), Galápagos (5.6 %) y Peruano-Chilena (8.9 %). Así mismo, el 33.3 % de las especies son endémicas del Atlántico occidental donde tienen mayor afinidad con la provincia Caribeña (31.9 %), seguido por la Caroliniana (24.4 %) y Brasileña (6.6 %).

The diversity of chondrychthyans in Mexico is described. The fauna is composed by 214 species (111 sharks, 95 rays and 8 chimaeras) and represents 17.3 % of the total number of species recorded worldwide. The families with the highest diversity comprise: Rajidae (14.5 %), Carcharhinidae (12.1 %), Pentanchidae, Triakidae, and Urotrygonidae (5.1 %). In terms of geographical distribution, the diversity on the Mexican Pacific slope reaches up to 56.1 % of those species inhabiting Mexican marine and brackish waters (120 species, 62 genera, 37 families and 14 orders); the diversity in the Atlantic slope resulted similar to that on the Mexican Pacific with 55.1 % of the species (118 species, 59 genera, 35 families and 13 orders). The biogeographical affinities of the Mexican chondrychthyan fauna are complex with 19.7 % of the species being circumglobal, 9.9 % transatlantic, 1.9 % transpacific, and 9.4 % endemic to the exclusive economic zone. Additionally, 36.6 % of the species recorded so far are endemic to the Eastern Pacific coast where the species are similar to those found in the Cortez biogeographic province (27.7 %), followed by the Californian (20.7 %), Panamanian (19.3 %), Galapagos (5.6 %) and Peruvian-Chilean (8.9 %). Likewise, 33.3 % are endemic of the Atlantic coast, where species are similar to those found in the Caribbean province (31.9 %), followed by the Carolinean (24.4 %) and the Brazilian (6.6 %).

Keywords

sharks, Biodiversidad, condrichthyans, rayas, Species Specificity, rays, biogeografía, Animals, Skates, Fish, tiburones, quimeras, Chordata, Atlantic Ocean, Mexico, biogeography, Pacific Ocean, condrictios, Mexico., Biodiversity, chimaeras, Sharks, México., Animal Distribution

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
2
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